Prevalence of Collar Rot of Tomato Caused by Sclerotium rolfsii (Sacc.) under the Red and Lateritic Zone of West Bengal

Occurrence of different diseases of tomato under field condition in Raipur

“…In rabi the first appearance of collar rot was observed in the first fortnight of December with percent disease incidence of 1.04, 1.01 and 0.67 and continued up to the first fortnight of March and maximum percent disease incidence (2.25, 4.38 and 3.33) was observed in the first fortnight of January and February and the second fortnight of January in 2014-15, 2015-16 and 2016-17 (Tables 1, 2 and 3). In field condition the incidence of collar rot was recorded 5 to 10 percent in Raipur, Chhattisgarh (Anonymous, 2013-14) [5] , 10-45 percent in Himachal Pradesh (Banyal, et al 2008) [10] and 7.61 to 21.79 percent in undulating red and lateritic zone of West Bengal (Mahato, et al (2017) [22] .…”

“…Tomato is known to susceptible for more than 200 diseases (Shelat et al 2014) [42] . Among them collar rot or Sclerotium wilt; Sclerotium rolfsii (Mahato et al 2017) [22] , damping off; Fusarium spp., Pythium spp., Rhizoctonia solani, Sclerotium rolfsii (Prasad et al 2017) [33] , early blight; Alternaria solani (Roopa, 2012) [39] , Fusarium wilt; Fusarium oxysporum f.sp. lycopersici (Manikandan and Raguchander, 2014) [23] , late blight (Olanya et al 2015) [30] , Septoria leaf spot (Parker et al 1997 andBlum, 2000) [31,11] , bacterial fruit canker; Clavibacter michiganensis subsp.…”

“…lycopersici (Manikandan and Raguchander, 2014) [23] , late blight (Olanya et al 2015) [30] , Septoria leaf spot (Parker et al 1997 andBlum, 2000) [31,11] , bacterial fruit canker; Clavibacter michiganensis subsp. michiganensis (Ftayeh et al 2010 andSharabani et al 2013) [18,41] , bacterial wilt; Ralstonia solanacearum (Ayana and Fininsa, 2016) [9] , bud blight; Groundnut bud necrosis virus (Manjunatha et al 2010) [24] , leaf curl; Tomato leaf curl virus (Shelat et al 2014 andYadav et al 2014) [42,48] , tomato mosaic; Tomato mosaic virus (Alishiri et al 2013) [4] , tomato spotted wilt; Tomato spotted wilt virus (Sevik and Arli-Sokmen, 2012) [40] and Root knot; Meloidogyne spp (Naz et al 2012) [28] are major diseases of tomato (Mahato et al 2017) [22] . But it is not necessary that all these diseases occur at the same time with great extent in one crop season, climatic conditions and location because the climatic conditions of a particular area favours some specific pathogens and this is the important consideration for the management of disease.…”

Exploring the Potential Biocontrol Isolates of Trichoderma asperellum for Management of Collar Rot Disease in Tomato

“…It causes significant losses in various crops in India, including peanuts, soybeans, tomatoes, peppers, and many others. In peanut and tomato crops, the losses due to A. rolfsii in India have been estimated to be around 30-40% of the total crop yield [5][6][7]. Management is not successful in the field because of the soil-borne nature of the pathogen.…”